Large Deployment Container Networking Challenges?

I’d like to hear from those of you in the comments section regarding deploying software in containers today into production. My interest is specifically regarding large deployments across a number of servers, and the issues you’re having with networking. People really using Kubernetes and Docker Swarm. Not those tinkering with containers on a single host, but DevOps who’ve suffered the real bruises and scraps from setting up MACvlans, IPvlans, Calico, Flannel, Kuryr, Magnum, Weave, Contiy Networking, etc…

Some will suggest I read the various mailing lists (check), join Slack channels (check), attend DockerCon (check), or even contribute to projects they prefer (you really don’t want my code). I’m not looking for that sort of feedback because in all those various forums the problem I have at my level of container networking experience is separating the posers from the real doers. My hope is that those willing to suggest ideas, can provide concrete examples of server-based container networking rough edges they’ve experienced and that if improved it would make a significant difference for their company. If that’s you then please comment publicly below, or use the private form to the right. Thank you for your time.